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- W2950338494 abstract "Abstract Propargyl-type alcohols ( 6 ) and the corresponding esters of carbonic acid ( 4 ) or acetic acid ( 5 ) react with two equivalents of Me 2 PhSiH in the presence of catalytic amounts of Rh 4 (CO) 12 under CO pressure at 100°C to give 2-(dimethylphenylsilylmethyl)-2-alkenals ( 3 ), whereas 2-substituted-3-(dimethylphenylsilyl)propenals ( 7 , 8 and 9 ) are also isolated with the concomitant formation of 3 when a similar reaction is operated with shortage of Me 2 PhSiH or with lowering of reaction temperature. The isolated 9 is selectively converted to 3 by the Rh 4 (CO) 12 catalyzed reaction with Me 2 PhSiH under CO pressure. This fact suggests that the transformation of 4 , 5 or 6 to 3 is accomplished by either a one-pot procedure or a stepwise procedure relayed by 7 , 8 or 9 . Usefulness of this protocol is demonstrated by the synthesis of 18 in which ethisterone ( 17 ) is directly converted by a one-pot procedure." @default.
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- W2950338494 date "1999-02-01" @default.
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- W2950338494 title "Rhodium-catalyzed transformation of propargyl alcohol derivatives to 2-silylmethyl-2-alkenals" @default.
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- W2950338494 doi "https://doi.org/10.1016/s0022-328x(98)00933-4" @default.
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